Fix to .pro file for generating linux builds: should work with any Qt5 version, not just 5.3.
Fix to .pro file for generating linux builds: should work with any Qt5 version, not just 5.3.

billvaglienti/ProtoGen,billvaglienti/ProtoGen,billvaglienti/ProtoGen,jefffisher/ProtoGen,jefffisher/ProtoGen,jefffisher/ProtoGen